Luthee e



(No Model.)

L. R. FAUGHT.

CHILL FOR CASTING GAR WHEELS.

Patented May 4, 1886.

WITNESS-ES: W

UNITED STATES PATENT OFFICE.

LUTHER R. FAUGHT, OF PHILADELPHIA, PENNSYLVANIA.

CHILL FOR CASTING CAR-WHEELS.

EPBCIFICATION forming part of Letters Patent No. 341,326, dated May 4,1886.

Application filed February 10, 1886. Serial No. 191,415.

T0 01% whom it may concern:

Be it known that I, LUTHER R. FAUGHT, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented a certain newand useful Improvementin Ohills for Car- WVheels, of which improvementthe following is a specification.

My invention relates to chills for casting car-wheels of that class ortype in which a circularseriesof segmental blocks is employed to receiveand form the outer boundary of the molten metal of which the casting iscomposed; and the object of the invention is to insure the utilizationof theinward expansion of the segments of the chill to as high a degreeas practicable in maintaining their close and continu ous contact withthe metal of the casting, thereby attaining a correspondingly completeand uniform density of chill upon the tread of the wheel and regularcircular contour of the same.

To this end my invention, generally stated, consists in the combinationof a continuous rim or outer section, an inner section which is radiallydivided into a series of separate chilling blocks or segments, eachconnected with the outer section, and a circumferential series of tiesor connecting-pieces by which the segments of the divided inner sec tionare united one to another.

The improvement claimed is more fully set forth.

In the accompanying drawings, Figure 1 is a plan or top View of a chillembodying my invention Fig. 2, a vertical section through the same atthe line a; w of Fig. 1; and Fig. 3 a View in elevation of a portion ofthe same, as seen from the bottom.

In the practice of my invention I construct a chill having a continuouscircular outer section or rim, 1, the depth of which may be about equalto or somewhat greater than the width of the treads of the wheels forthe casting of which the chill is designed, and an inner sectioncomposed of a circular series of chilling blocks or segments, 2, whichare arranged closely adjacent one to the other, the inner diameter ofthe ring formed by the series of blocks corresponding substantially withthat of the trends of the wheels to be cast. The inner surfaces of theblocks or segments 2 correspond in vertical outline and depth with thehereinafter (N0 model.)

wearing-surface of the tread and inner side of its flange, and eachsegment is connected by a radial arm or plate. 3,with the outersection, 1. The segments 2and arms 3 are preferably cast integral withthe outer section, 1, the segments 2 being separated one from the otherby narrow radial splits or divisions 4, which may be formed either bytheinsertion of suitable dividing-pieces in the mold in casting the chillor by sawing out subsequently thereto.

It will be obvious that, if preferred, any desired number of thesegments may be cast together iu separate groups and bolted or rivetedto an outer section.

Under the above-described construction the action of the hightemperature of the molten metal poured into the chill in casting a wheelinduces an inward expansion of the segments 2 and arms 3,which tends tohold the segments against the outer surface of the metal during andafter its solidification, and, by the contact of the comparatively coldsurfaces of the segments with the metal, to effect such abstraction ofheat therefrom as is requisite to form a chill of proper density anddepth on the tread and flange. It will be seen that the effectiveness ofsuch inward expansion of the segments and the radial arms by which theyare connected to the continuous outersection will be increasedproportionately to the increase of length of the arms; but an increaseof length of the arms to the extent which is desirable involves theobjection that the segments are weak and deficient in lateral support,and hence the true circular form of the chill cannot be readily producedby turning, nor canit be maintained with certainty during the changes oftemperature which occur between the pouring and the solidification ofthe metal. To obviate such objection I provide a system ofcircumferential bracing for the chilling blocks or segments, whichafi'ords what may be termed a semidivided inner section in thechill-that is to say, one whose members are connected at their oppositeends alternately in such manner that while ample scope is admitted offor their independent inward expansion, they are continuously braced andsupported as against tendency of the section to be distorted either fromits normal internal circular figure or from true vertical lateralalignment. To this end the segments 2 are united one to the other ICOalternately at or near their upper and their lower ends by acircumferential series of ties or connecting-pieces, 5 6, extendingacross the spaces between the arms 3, and cast integral with the othermembers of the section 01 group of members of the section, as the casemay be. The ties 5 6 are located as closely as may be to the outersurfaces of the segments 2-that is, at or near the inner ends of theradial arms 3-and each segment is connected to the adjacent segment onone side by an upper tie, 5, and to that on the opposite side by a lowertie, 6. The same principle of connection of the segments may be utilizedwithout the provision of special ties bridging the spaces between thearms, as shown, by discontinuing the divisions 4 between the segmentsalternately at and near their upper and theirlower ends. A continuouslateral support is thus afforded to the entire series of segmentsforming the inner section, which insures its uniform contraction aroundthe hot metal which it receives, and thereby tends to preserve itscircular form and lateral alignment under the inward expansion of thearms and segments throughout the life of the chill, and such expansionis exerted freely and effectively upon the metal by reason of thealternate yielding of the segments at top and bottom uniformly aroundthe section.

I claim as my invention and desire to secure by Letters Patent- 1. Thecombination, in a chill, of a continuous rim or outer section and aninner section composed of aseries of separate chilling blocks orsegments, each connected radially to the outer section andcircumferentially to an adj acent segment, substantially as set forth.

2. The combination, in a chill, of a continuous rim or outer section andan inner section composed of a series of separate chilling blocks orsegments connected radially to the outer section and circumferentiallyone to another at or near their upper and their lower ends,respectively, substantially as set forth.

3. The combination, in a chill, of a continuous rim or outer section, aninternal concentric circular series of chilling blocks or segmentsseparated by radial divisions, a series of radial arms or plates, eachextending from one of said segments to the outer section, and a seriesof circumferential ties or connecting pieces uniting said segments andradial arms at or near their junction and alternately at or near theirupper and their lower ends, re spectively, substantially as set forth.

LUTHER R. FAUGHT.

Vitnesses:

J. SNOWDEN BELL, GEo. A. VAILLANT.

